Horizon Distance Calculator

Enter your height above see level, typically your eye level, into the calculator to determine the distance to the horizon.

Horizon Distance Formula

The following formula is used to calculate the horizon distance on Earth.

D = 1.22459 * Sqrt (h)

  • Where D is the horizon distance (miles)
  • h is the eye height above sea level (ft)

It’s important to note that this equation is specifically for calculating the horizon distance on Earth. The equation for calculating this on another planet would be different.

Horizon Distance Definition

A horizon distance is the total distance a person can see to the horizon given a certain height or eye level. In other words, the furthest distance a person can see at a given height due to the curve of the Earth.

Horizon Distance Example

How to calculate a horizon distance?

  1. First, determine the eye level.

    Calculate the total eye level height in feet of the individual.

  2. Next, calculate the distance.

    Using the formula above, calculate the distance in miles to the horizon.


What is a horizon?

A horizon is a point along a sphere that an object of a given height can “see” or has a line of site of.

horizon distance calculator
horizon distance formula